diff --git a/test/test_group.py b/test/test_group.py
index a11f592..5f42427 100644
--- a/test/test_group.py
+++ b/test/test_group.py
@@ -1,3 +1,5 @@
+from datetime import datetime
+
 from flask import url_for
 from werkzeug.exceptions import Forbidden
 from werkzeug.exceptions import NotFound
@@ -338,7 +340,7 @@ def test_show_group(db, client):
     assert 'text/html; charset=utf-8' == resp.content_type
     assert DEFAULT_GROUP_NAME in resp.data.decode()
 
-@create_group(id=DEFAULT_GROUP_ID, packages=['foo'], affected='1.2.3-3', fixed='1.2.3-4')
+@create_group(id=DEFAULT_GROUP_ID, created=datetime(2023, 5, 10), packages=['foo'], affected='1.2.3-3', fixed='1.2.3-4')
 @create_advisory(id=DEFAULT_ADVISORY_ID, group_package_id=DEFAULT_GROUP_ID, advisory_type=issue_types[1])
 def test_show_group_json(db, client):
     resp = client.get(url_for('tracker.show_group_json', avg=DEFAULT_GROUP_NAME, postfix='/json'), follow_redirects=True)
@@ -346,6 +348,7 @@ def test_show_group_json(db, client):
     assert 'application/json; charset=utf-8' == resp.content_type
     data = resp.get_json()
     assert data['name'] == DEFAULT_GROUP_NAME
+    assert data['date'] == '2023-05-10'
     assert data['issues'] == [DEFAULT_ISSUE_ID]
     assert data['packages'] == ['foo']
     assert data['affected'] == '1.2.3-3'
diff --git a/test/test_index.py b/test/test_index.py
index 255aec4..b9edb62 100644
--- a/test/test_index.py
+++ b/test/test_index.py
@@ -1,3 +1,5 @@
+from datetime import datetime
+
 from flask import url_for
 
 from .conftest import DEFAULT_GROUP_ID
@@ -32,7 +34,7 @@ def test_index_all(db, client):
 
 
 @create_package(name='foo', version='1.2.3-4')
-@create_group(id=DEFAULT_GROUP_ID, packages=['foo'], affected='1.2.3-3')
+@create_group(id=DEFAULT_GROUP_ID, created=datetime(2023, 5, 10), packages=['foo'], affected='1.2.3-3')
 def test_index_json(db, client):
     resp = client.get(url_for('tracker.index_json', only_vulernable=False), follow_redirects=True)
     assert 200 == resp.status_code
@@ -40,13 +42,15 @@ def test_index_json(db, client):
     assert 'application/json; charset=utf-8' == resp.content_type
     assert len(data) == 1
     assert data[0]['name'] == DEFAULT_GROUP_NAME
+    assert data[0]['date'] == '2023-05-10'
 
 
 @create_package(name='foo', version='1.2.3-4')
-@create_group(id=DEFAULT_GROUP_ID, packages=['foo'], affected='1.2.3-3')
+@create_group(id=DEFAULT_GROUP_ID, created=datetime(2023, 5, 10), packages=['foo'], affected='1.2.3-3')
 def test_index_vulnerable_json(db, client):
     resp = client.get(url_for('tracker.index_vulnerable_json'), follow_redirects=True)
     assert 200 == resp.status_code
     data = resp.get_json()
     assert len(data) == 1
     assert data[0]['name'] == DEFAULT_GROUP_NAME
+    assert data[0]['date'] == '2023-05-10'
diff --git a/tracker/view/index.py b/tracker/view/index.py
index 5891b11..c70ea58 100644
--- a/tracker/view/index.py
+++ b/tracker/view/index.py
@@ -90,6 +90,7 @@ def index_json(only_vulnerable=False):
 
         json_entry = OrderedDict()
         json_entry['name'] = group.name
+        json_entry['date'] = group.created.strftime('%Y-%m-%d')
         json_entry['packages'] = entry['pkgs']
         json_entry['status'] = group.status.label
         json_entry['severity'] = group.severity.label
diff --git a/tracker/view/show.py b/tracker/view/show.py
index fd555df..515ff99 100644
--- a/tracker/view/show.py
+++ b/tracker/view/show.py
@@ -282,6 +282,7 @@ def show_group_json(avg):
 
     json_data = OrderedDict()
     json_data['name'] = group.name
+    json_data['date'] = group.created.strftime('%Y-%m-%d')
     json_data['packages'] = [package.pkgname for package in packages]
     json_data['status'] = group.status.label
     json_data['severity'] = group.severity.label